Make secondary navigation configurable

[Erik Blomqvist]

I added an issue on github: https://github.com/sferik/rails_admin/issues/1038

If I could just get some guidance I would fix it myself. I just don't know how the configuration system works. I figure it can't be that hard, but that I need to follow conventions.

I've been searching Google, but I must not be using the right keywords, because all I find is how to configure rails and not how to make stuff configurable in rails.

Any help is appreciated.

Thanks.